JPH0357427Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an abrasive tape that can precisely and uniformly abrade a surface to be abraded without causing scratches.

[Prior Art] Generally, when polishing the surface of an object to be polished such as metal, it is first polished using a coarse abrasive, then successively finer, and finally polished with an extremely fine abrasive. Finishing the surface. In this final polishing, the presence of even the slightest scratch on the surface of the object to be polished is not allowed.

The above-mentioned final polishing is usually carried out using an abrasive tape or sheet (hereinafter referred to as abrasive), which has an abrasive layer 2 formed by coating a surface of a sheet 1 made of plastic, paper, etc. with extremely fine abrasive particles, as shown in FIGS. 3a and 3b. (referred to as tape) 3
is placed on a strip plate, and the surface of the object to be polished is rubbed against this surface for final polishing.

However, if fine sand particles etc. enter between the strip and the abrasive tape during polishing, the surface of the abrasive layer 2 will protrude.
Scratches occur on the polished surface. Therefore, there was a drawback that the polishing, which was nearing completion, had to be repeated to a certain degree of roughness.

In order to improve the above-mentioned drawbacks, the inventors of the present invention investigated various prototype abrasive tapes, and as a result, as shown in FIG.
An abrasive tape 5 was prepared to which an elastic sheet 4 made of synthetic rubber, foamed synthetic resin, etc. was attached to prevent the abrasive layer 2 from protruding and damaging the surface to be polished. moreover,
As shown in FIG. 5, an adhesive 6 is applied to the lower surface of the elastic sheet 4, and this is covered with paper 7, etc. When using the abrasive tape, the paper 7 is peeled off to expose the adhesive, and this is It is easy to use by being able to be attached and fixed to a strip plate, etc.

By the way, the polishing tape 5 can completely absorb the influence of foreign matter that gets between the strip plate etc. and the polishing tape 5 due to the elastic sheet 4, but as shown in FIG. When a foreign substance 8 enters between the abrasive layer 2 and the abrasive layer 2, the abrasive layer 2 becomes concave as the sheet 1 becomes concave, forming a large concave portion 9. Since this portion is not polished, the abrasive layer 2 becomes concave. There was a problem in that scratches were generated on the polished surface of the polishing body 10.

Recently, in computer hard disks, the A substrate is plated with Ni, P, etc., and this side is plated with Ni, P, etc.
Fe, Cr, Co, etc. are sputtered, but in order to firmly fix the sputtered metal, it is necessary to polish the plated surface to create uniform fine scratches on the surface. is used. In this case, there is a strong demand for uniform polishing without scratching.

[Problems to be solved by the invention] In view of the above circumstances, the present invention solves the problem even if some foreign matter gets between the abrasive layer and the object to be polished, or between the abrasive tape and the strip plate, etc. during polishing. The purpose is to provide an abrasive tape that is not affected.

[Means for solving the problem] The present invention was made to achieve the above object, and its gist is to provide an abrasive tape in which a thin layer of fine abrasive particles is directly provided on the surface of a thin foamed synthetic resin sheet. It is in.

[Specific structure and function of the invention] The present invention will be explained below with reference to the drawings.

FIG. 1 shows an embodiment of the abrasive tape according to the present invention, and reference numeral 11 in the figure is a thin foamed synthetic resin sheet containing fine air bubbles. An abrasive layer 12 formed by applying fine particles of abrasive is provided on the surface of the foamed synthetic resin sheet 11.
An abrasive tape 13 is constructed.

Foamed synthetic resin sheet 11 used in the present invention
are polypropylene, polyethylene, urethane,
A foam sheet made from ordinary synthetic resins such as styrene and polyester, with a thickness of 20~
A range of 500 μm, particularly 40 to 150 μm is preferred. If the thickness is less than 20 μm, the elasticity of the foam sheet will not be fully exhibited, and if it exceeds 500 μm, it will become too thick and difficult to polish.

Further, as the abrasive material used, fine particles of ordinary abrasive materials such as alumina, silicon carbide, diamond, etc. can be used.

Further, during production, the abrasive particles may be applied and adhered to the surface of the foamed synthetic resin sheet, or the abrasive particles may be applied to the synthetic resin sheet before foaming, and then the sheet may be foamed.

When an object to be polished is polished using the abrasive tape having the above structure, and a foreign object 8 enters the polished surface as shown in FIG. 2 during polishing, the foreign object 8 is pressed against the surface of the object to be polished 10. Since the abrasive layer 12 is in direct contact with the foamed synthetic resin sheet 11, only the foreign matter 8 is pushed into the abrasive layer 12 due to its elasticity, and no large recesses are formed. Therefore, the polished surface of the object 10 to be polished is polished almost evenly, and the occurrence of large scratches is prevented.

[Effects] As described above, the polishing tape according to the present invention can perform polishing almost unaffected even if some foreign matter enters the surface being polished, so it is suitable for polishing computer hard disks and other objects. can be carried out efficiently, and the economic effect is extremely large.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view showing one embodiment of the abrasive tape according to the present invention, FIG. Figures a and b show conventional abrasive tapes, with Figure 3 a being a perspective view and Figure 3 b being a perspective view of Figure 3 a.
4 and 5 are cross-sectional views taken along the - line arrow of
The longitudinal cross-sectional view of the prototype abrasive tape, Figure 6, is
FIG. 3 is a diagram showing a state in which foreign matter has entered the polished surface when polishing is performed using the polishing tape shown in the figure. 8... Foreign matter, 10... To be polished, 11... Foamed synthetic resin sheet, 12... Abrasive material layer, 13...
Abrasive tape.

Claims (1)

[Scope of utility model registration request] An abrasive tape characterized by having a thin layer of fine abrasive particles placed directly on the surface of a thin foamed synthetic resin sheet.